Cosmetic brush



FIG. 1 is an isometric view of the claimed design.

FIG. 2 is a top view of the claimed design.

FIG. 3 is a front view of the claimed design; and,

FIG. 4 is a rear view of the claimed design.

The cosmetic brush is for use with mascara fluid. The broken linesshowing rear end surfaces of the brush form no part of the claimeddesign.

The ornamental design for a cosmetic brush, as shown and described.